kornel's story.had mild symptoms and progressed several days later and also what he said about the blood work, you can get the negative for the flu but there are things in your blood that could indicate something viral, where he had something that he thought was a clear indication of coronavirus before he got the results. >> this is something worth noting that the time between when someone develops some mild symptom tuesday the time when they may develop more serious symptoms can be several days, and i think it's up to nine days. so just something to keep in the back of the mind that you sort of have these mild symptoms but they may either progressively get worse or more suddenly get worse as it sounds like the case with dr. kornel several days into this. yes, there is a blood test. this is different than the test that actually finds the presence of a virus. what happens with this blood test there are certain blood counts, your white blood cell counts and your lymphsites which change. turned out to b